Single ore type to produce gold, silver metal and high-grade zinc concentrate

29 September 2007 | 04:26 Code : 15435 Geoscience events
Leyshon Resources expects to be able to produce a high-grade zinc concentrat....

  Leyshon Resources expects to be able to produce a high-grade zinc concentrate as well as gold and silver metal from a single ore type at its Zheng Guang project in Heilongjiang, northeast China.Independent metallurgical consultancy Metallurg Pty Ltd of Australia has reported on the latest testwork program on the proposed gold and zinc flotation circuit undertaken by AMMTEC (Australian Metallurgical & Mineral Testing Consultants) of Western Australia. Recovery of gold from sulphide ore has improved from 84 to 87 percent, based on the leaching of gold and silver metal from a high-grade concentrate produced from the proposed whole of ore flotation circuit. Further grinding and flotation of the same concentrate produced a saleable zinc concentrate grading 47 percent zinc at a recovery of 87 percent zinc. The results confirm that there will be no requirement for mining and treating separate ore types, meaning that a single gold/zinc sulphide ore can be supplied to the plant. This will have considerable benefits in terms of grade control and lower mining costs as larger volumes of ore can be mined without incurring the difficulty of separating the ore types. Managing Director Paul Atherley said the company was delighted with the results. “The ability to bulk mine a single ore type and produce gold and silver metal with a saleable high-grade zinc concentrate is very encouraging,” Mr Atherley said.“It will also be a very straightforward process route to allow the company to bring to bear the full benefits of low Chinese capital and operating costs to the project.”

tags: QAZVIN

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